Fatal error: Uncaught Error: Class 'Doctrine\DBAL\Exception\ServerException' not found in E:\xampp\htdocs\www\yunwei\qr250\vendor\doctrine\dbal\src\Exception\DatabaseObjectNotFoundException.php:12 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\yunwei\qr250\vendor\doctrine\dbal\src\Exception\DatabaseObjectNotFoundException.php on line 12